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US 8,986,368 B2Granted
Esophageal stent with valve
AssigneeMerit Medical Systems, Inc.
InventorsDarla Gill, Zeke Eller, Rich Snider, Trent Clegg
Life of this patent
Estimating the term…
Abstract
A stent comprised of a valve and a scaffolding structure having components configured to allow at least a portion of the stent to decrease in diameter in response to an axial force applied to the stent. Further, the components and elements of the stent may be configured to balance transverse forces applied to the stent, thus reducing the incidence of infolding.
Claims23
An implantable device having a generally cylindrical shape, configured to be disposed within a body lumen, the device comprising:
- a scaffolding of struts, comprising:
- a plurality of annular segments disposed along the circumference of the cylindrical shape, the segments arranged in rows in the longitudinal direction of the cylindrical shape, each annular segment comprising a plurality of interconnected arms with adjacent arms arranged at acute angles relative to each other;
- a plurality of connectors extending between and interconnecting adjacent annular segments;
- a valve coupled to an inside diameter of the cylindrical shape;
- and
- a plurality of eyelets, elongated in a circumferential direction of the cylindrical shape, the eyelets configured to receive a suture, and the eyelets disposed adjacent a first longitudinal end of the cylindrical shape,
- wherein the annular segments and connectors of the implantable device define a proximal zone adjacent the first longitudinal end of the cylindrical shape, a valve zone adjacent a second longitudinal end of the cylindrical shape, the valve zone defining a location where the valve is located, and a transition zone located between the valve zone and the proximal zone, each zone comprising a plurality of annular segments, wherein the transition zone is more compressible in a transverse direction than the valve zone, and wherein the proximal zone is more compressible in the transverse direction than the transition zone, wherein the device is configured with a greater number of connectors per row of annular segments in the valve zone compared to the transition zone, and a greater number of connectors per row of annular segments in the transition zone compared to the proximal zone;
- and
- a polymeric cover applied to and between the scaffolding of struts.
6 more elements
An implantable device having a generally cylindrical shape, configured to be disposed within a body lumen, the device comprising:
- a scaffolding of struts, comprising:
- a plurality of annular segments disposed along the circumference of the cylindrical shape, the segments arranged in rows in the longitudinal direction of the cylindrical shape, each annular segment comprising a plurality of interconnected arms with adjacent arms arranged at acute angles relative to each other;
- a valve coupled to an inside diameter of the cylindrical shape;
- and
- a plurality of connectors extending between and interconnecting adjacent annular segments,
- wherein the annular segments and connectors define a proximal zone adiacent a first longitudinal end of the cylindrical shape, a valve zone adiacent a second longitudinal end of the cylindrical shape, the valve zone defining a location where the valve is located, and a transition zone located between the valve zone and the proximal zone, each zone comprising a plurality of annular segments, wherein the acute angles at which adjacent interconnected arms are joined in the proximal zone are larger than the acute angles at which adjacent interconnected arms are joined in the transition zone, such that the proximal zone is more compressible in a transverse direction than the transition zone, and wherein the acute angles at which adjacent interconnected arms are joined in the transition zone are larger than the acute angles at which adjacent interconnected arms are joined in the valve zone, such that the transition zone is more compressible in the transverse direction than the valve zone;
- and
- a polymeric cover applied to and between the scaffolding of struts.
5 more elements
An implantable device having a generally cylindrical shape, configured to be disposed within a body lumen, the device comprising:
- a scaffolding of struts, comprising:
- a plurality of annular segments disposed along the circumference of the cylindrical shape, the segments arranged in rows in the longitudinal direction of the cylindrical shape, each annular segment comprising a plurality of interconnected arms;
- a valve coupled to an inside diameter of the cylindrical shape;
- and
- a plurality of connectors extending between and interconnecting adjacent annular segments,
- wherein the annular segments and connectors define a proximal zone adjacent a first longitudinal end of the cylindrical shape, a valve zone adjacent a second longitudinal end of the cylindrical shape, the valve zone defining a location where the valve is located, and a transition zone located between the valve zone and the proximal zone, each zone comprising a plurality of annular segments, wherein the transition zone is more compressible in a transverse direction than the valve zone, and wherein the proximal zone is more compressible in the transverse direction than the transition zone, wherein adjacent arms of the plurality of interconnected arms are arranged at acute angles relative to each other, wherein the acute angles at which adjacent interconnected arms are joined in the proximal zone are larger than the acute angles at which adjacent interconnected arms are joined in the transition zone and wherein the acute angles at which adjacent interconnected arms are joined in the transition zone are larger than the acute angles at which adjacent interconnected arms are joined in the valve zone, wherein the scaffolding of struts further comprises a plurality of eyelets, elongated in a circumferential direction of the cylindrical shape, the eyelets disposed adjacent the first longitudinal end of the cylindrical shape and configured to receive a suture;
- and
- a polymeric cover applied to and between the scaffolding of struts.
5 more elements
Dependencies are inferred from the claim text.